Improvement in spark-arresters



J. W. SEIGH.

Spark-Arresters.

NO.145,596, Patented Dec.16,1873.

WiTNEE 5 E5: INVENTU r1- UNITED STATES PATENT QFFICE.

JOHN W. SEIGH, OF JOHNSTOWN, PENNSYLVANIA.

IMPROVEMENT IN SPARK-ARRESTERS.

Specification forming part of Letters Patent No. 145,596, dated December '16, 1873; application filed December 5, 1873.

To all whom it may concern:

Be it known that I, JOHN WV. SEIGH, of J ohnstown, in the county of Gambria and State of Pennsylvania, have invented certain new and useful Improvements in Spark-Arresters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

The nature of my invention relates to an improvement in spark-arresters; and it consists in an inverted perforated cone arranged in the will be more fully described hereafter.

The accompanying drawings represent my invention.

a represents an ordinary locomotive smokestack. In the enlargement b is centered the inverted perforated cone 0, which is about onehalf the interior diameter of the enlargement in size at its top edge, d. This cone is supported in position by means of a number of slotted braces, 6,.Whl0h have their lower ends fastened to the inside of the stack by means of the bolts .g. By loosening these bolts the cone can be moved upward in the enlargement, so as to decrease the size of the opening through which the smoke escapes, or can be moved downward, so as to enlarge the opening and let the smoke freely escape, and thus create a greater draft for the fire. Secured to the top of the cone, by means of the'rigid braces t, is the tapering curved ring h, the lower edge of which is about two inches above the top of the cone. As the sparks and cinders rise up above the sides of the cone, they strike against the curved sides of this ring, and are deflected over against the sides of the stack, as shown by arrows in Fig. 1. Secured to the inside edge of the top of the stack is the perforated ring 1, which is held in position by means of the bolts 0, and which forms a downwardlyprojecting flange, behind which the cinders and sparks are caught as they rise above the top of the ring it, and where they are held by the force of the upward draft from the exhaust below. As soon as the exhaust is shut off they fall downward into the cone below; and then, at the first puff of the exhaust again, they are blown up through the top of the stack into the air. Upon the top of this ring is placed the perforated annulus or ring n, which closes the top of the space-between the edge of the stack and the edge of the ring I, and which is held in position by means of the small clamps 2. The force of the exhaust drives the cinders and sparks upward with such force that, as they strike the cone, ring, side of the stack, and under side of the ring a, they are thoroughly broken up, so that a large part of them escapes through the perforations into the air.

Having thus described my invention, 1 claim 1. The combination of the cone 0, ring h, and slotted braces e, substantially as specified.

2. The combination of the stack a, cone 0, rings h l n, and standards 6, substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 5th day of December, 1873.

JOHN W. SEIGH. Witnesses:

I. A. LEHMANN, WM. HALE. 

